package com.java01.file;

import java.io.File;

public class CreateDirs {

	public static void main(String[] args) {
		File dirRoot = new File("D:\\");
		File dirA = new File(dirRoot,"A");
		File dirB = new File(dirA,"B");
		
		if(!dirB.exists()){
			dirB.mkdirs();
		}
	}
}
